CIE1931
CIE 1931 refers to the standard color space and associated color-matching data defined by the International Commission on Illumination (CIE). It is based on color-matching experiments conducted by Wright and Guild in the 1920s and was adopted by CIE in 1931 as a framework for describing colors in a device-independent way.
Two standard observers were defined: a 2-degree field and, later, a 10-degree field to model different viewing
From these functions, the CIE XYZ tristimulus values X, Y, Z are obtained by linear integration with
Chromaticity coordinates are defined as x = X/(X+Y+Z), y = Y/(X+Y+Z), and z = Z/(X+Y+Z). The x,y chromaticity diagram
Applications and legacy include underpinning modern color management, calibration, and the derivation of perceptual spaces such